1// Copyright 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 6#define MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 7 8#include <list> 9 10#include "base/macros.h" 11#include "mojo/system/dispatcher.h" 12#include "mojo/system/system_impl_export.h" 13#include "mojo/system/waiter_list.h" 14 15namespace mojo { 16namespace system { 17 18// A base class for simple dispatchers. "Simple" means that there's a one-to-one 19// correspondence between handles and dispatchers (see the explanatory comment 20// in core.cc). This class implements the standard waiter-signalling mechanism 21// in that case. 22class MOJO_SYSTEM_IMPL_EXPORT SimpleDispatcher : public Dispatcher { 23 protected: 24 SimpleDispatcher(); 25 virtual ~SimpleDispatcher(); 26 27 // To be called by subclasses when the state changes (so 28 // |GetHandleSignalsStateImplNoLock()| should be checked again). Must be 29 // called under lock. 30 void HandleSignalsStateChangedNoLock(); 31 32 // |Dispatcher| protected methods: 33 virtual void CancelAllWaitersNoLock() OVERRIDE; 34 virtual MojoResult AddWaiterImplNoLock( 35 Waiter* waiter, 36 MojoHandleSignals signals, 37 uint32_t context, 38 HandleSignalsState* signals_state) OVERRIDE; 39 virtual void RemoveWaiterImplNoLock( 40 Waiter* waiter, 41 HandleSignalsState* signals_state) OVERRIDE; 42 43 private: 44 // Protected by |lock()|: 45 WaiterList waiter_list_; 46 47 DISALLOW_COPY_AND_ASSIGN(SimpleDispatcher); 48}; 49 50} // namespace system 51} // namespace mojo 52 53#endif // MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 54